Hamilton, Ontario police have a major caper on their hands after thieves stole $45,000 worth of green—salad greens that is.

During the heist, which took place on April 1 (and no, this isn’t a joke), robbers commandeered a refrigerated commercial truck loaded with thousands of dollars worth of lettuce. Before you go asking whether this was some kind of speciality, imported Japanese lettuce, hand-cut in the forests of Hokkaido: no, just the regular kind you cover in ranch dressing. Or blue cheese, if that’s more your style.

Spotting a unique opportunity, the Hamilton police department jumped into action with their best and brightest…puns.

Through various social media outlets, HPD asked the public to “Romaine Calm,” and solicited tips from the public about the heist, saying, “Lettuce know if you have any tips.”

Police say that the truck was driven to nearby Toronto, where it was discovered, but the attached trailer and cache of ruffage is still missing. So far, the social media campaign hasn’t developed any further leads.

If you have any information, please kale Crime Stoppers at 1-800-222-8477.